8220481 has 2 divisors, whose sum is σ = 8220482. Its totient is φ = 8220480.

The previous prime is 8220461. The next prime is 8220493. The reversal of 8220481 is 1840228.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 608400 = 2759^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 8220481 - 2⁹ = 8219969 is a prime.

It is a super-2 number, since 2×8220481² = 135152615742722, which contains 22 as substring.

It is an Ulam number.

It is equal to p₅₅₃₆₁₅ and since 8220481 and 553615 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8220461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4110240 + 4110241.

It is an arithmetic number, because the mean of its divisors is an integer number (4110241).

Almost surely, 2^8220481 is an apocalyptic number.

It is an amenable number.

8220481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8220481 is an equidigital number, since it uses as much as digits as its factorization.

8220481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 8220481 is about 2867.1381201470. The cubic root of 8220481 is about 201.8207163295.

The spelling of 8220481 in words is "eight million, two hundred twenty thousand, four hundred eighty-one".